Utilization of Lignite Reserves and Simultaneous Improvement of Dust Emissions and Operation Efficiency of a Power Plant by Controlling the Calcium (Total and Free) Content of the Fed Lignite. Application on the Agios Dimitrios Power Plant, Ptolemais, Greece
| Autor: | Nestoras Kolovos, and Anestis Filippidis, Andreas Georgakopoulos, Constantinos Kavouridis |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Energy & Fuels. 16:1516-1522 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef020090o |
| Popis: | The lignite thermal plant operation is affected by the fuel quality. In the lignite mines of Northern Greece, both inorganic impurities and thin intercalations, especially when they consist of carbonate minerals, co-excavated with lignite, reduce the run-of-mine lignite quality. Before any lignite exploitation or combustion process study, both the lignite and the lignite ash quality have to be thoroughly investigated in order for the recoverable blocks of lignite to be determined. Marly layers, characterized as marly limestones, containing up to 95% CaCO3, are thermally decomposed producing a high percent of CaO and CO2. The high CaO(total) and CaO(free) contents of the lignite ash cause fouling problems in the combustion systems of the power plants and increase the solid particle emissions to the atmosphere. To control the CaO(free) content of the ash below a critical limit of 11%, an index (∑) = [CO2 in lignite/ash(d.b.)] × 100 may be used. For values of (∑) lower than 17, the CaO(free) of the lignite a... |
| Databáze: | OpenAIRE |
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